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Vulnerability record · CVE-2021-41842 · published 6 January 2022

CVE-2021-41842: Insydeh2o vulnerability

Insyde · Insydeh2o

An issue was discovered in AtaLegacySmm in the kernel 5.0 before 05.08.46, 5.1 before 05.16.46, 5.2 before 05.26.46, 5.3 before 05.35.46, 5.4 before 05.43.46, and 5.5 before 05.51.45 in Insyde InsydeH2O. Code execution can occur because the SMI handler lacks a CommBuffer check.

9.8 CVSS 3.1 Critical EPSS 1.5% · top 26.2%
9.8CVSS 3.1 base score, v2 7.5
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in AtaLegacySmm in the kernel 5.0 before 05.08.46, 5.1 before 05.16.46, 5.2 before 05.26.46, 5.3 before 05.35.46, 5.4 before 05.43.46, and 5.5 before 05.51.45 in Insyde InsydeH2O. Code execution can occur because the SMI handler lacks a CommBuffer check.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://security.netapp.com/advisory/ntap-20220223-0002/ Third Party Advisory
https://www.insyde.com/security-pledge Vendor Advisory
https://security.netapp.com/advisory/ntap-20220223-0002/ Third Party Advisory
https://www.insyde.com/security-pledge Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-39281Insydeh2o out-of-bounds write vulnerabilityA stack buffer overflow vulnerability discovered in AsfSecureBootDxe in Insyde InsydeH2O with kernel 5.0 through 5.5 allows attackers to run arbitrar…EPSS 0.49%8.8CVE-2023-22613Insydeh2o out-of-bounds write vulnerabilityAn issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. It is possible to write to an attacker-controlled address. An at…EPSS 0.21%8.8CVE-2023-22612Insydeh2o out-of-bounds write vulnerabilityAn issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. A malicious host OS can invoke an Insyde SMI handler with malfor…EPSS 0.23%8.8CVE-2023-22614Insydeh2o out-of-bounds write vulnerabilityAn issue was discovered in ChipsetSvcSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. There is insufficient input validation in BIOS Guard update…EPSS 0.38%8.4CVE-2023-22615Insydeh2o out-of-bounds write vulnerabilityAn issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. IHISI subfunction execution may corrupt SMRAM. An attacker can p…EPSS 0.20%8.2CVE-2022-36448Insydeh2o improper input validation vulnerabilityAn issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. There is an SMM memory corruption vulnerability in the Software SMI handler …EPSS 0.34%8.2CVE-2022-35893Insydeh2o improper input validation vulnerabilityAn issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. An SMM memory corruption vulnerability in the FvbServicesRuntimeDxe driver a…EPSS 0.23%8.2CVE-2022-36338Insydeh2o vulnerabilityAn issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. An SMM callout vulnerability in the SMM driver FwBlockServiceSmm, creating S…EPSS 0.46%

Source: NIST National Vulnerability Database (record CVE-2021-41842), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.